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OpenJDK (Open Java Development Kit) is a free and open-source implementation of the Java Platform, Standard Edition (Java SE). [2] It is the result of an effort Sun Microsystems began in 2006, four years before the company was acquired by Oracle Corporation .
The Java Development Kit (JDK) is a distribution of Java technology by Oracle Corporation.It implements the Java Language Specification (JLS) and the Java Virtual Machine Specification (JVMS) and provides the Standard Edition (SE) of the Java Application Programming Interface (API).
Sun released most of its Java source code as free software in May 2007, so it can now almost be considered a free Java implementation. [1] Java implementations include compilers, runtimes, class libraries, etc. Advocates of free and open source software refer to free or open source Java virtual machine software as free runtimes or free Java ...
OpenJDK 20.0.1 GraalVM for JDK 21 2023-09-19 Oracle JDK 21 OpenJDK 21 This release brought all Java SE 21 features to GraalVM such as virtual threads from Project Loom. Performance improvements in this release made ahead-of-time compiled Java applications run at peak performance as on HotSpot.
the source/destination of the stream data; the type of data written to/read from the stream; additional processing or filtering performed on the stream data; The stream subclasses are named using the naming pattern XxxStreamType where Xxx is the name describing the feature and StreamType is one of InputStream, OutputStream, Reader, or Writer.
However, since the release of OpenJDK, a specific license allows running the JCK in the OpenJDK context, that is for any GPL implementation deriving substantially from OpenJDK. [4] [5] The OpenJDK Community TCK License Agreement v 2.0 has been published for the Java SE 7 Specification since December 2011. [6]
The code that scales and rasterizes fonts uses open source FreeType [14] [15] [16] The native color management uses open-source LittleCMS . [ 15 ] There is a pluggable layer in the JDK, so that the commercial release of Java can use the original, proprietary color management system and OpenJDK can use LittleCMS.
Java is a high-level, class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible. It is a general-purpose programming language intended to let programmers write once, run anywhere (), [16] meaning that compiled Java code can run on all platforms that support Java without the need to recompile. [17]